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package forward
import (
"github.com/coredns/coredns/plugin"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
)
// Variables declared for monitoring.
var (
RequestCount = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "requests_total",
Help: "Counter of requests made per upstream.",
}, []string{"to"})
RcodeCount = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "responses_total",
Help: "Counter of responses received per upstream.",
}, []string{"rcode", "to"})
RequestDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "request_duration_seconds",
Buckets: plugin.TimeBuckets,
Help: "Histogram of the time each request took.",
}, []string{"to", "rcode"})
HealthcheckFailureCount = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "healthcheck_failures_total",
Help: "Counter of the number of failed healthchecks.",
}, []string{"to"})
HealthcheckBrokenCount = promauto.NewCounter(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "healthcheck_broken_total",
Help: "Counter of the number of complete failures of the healthchecks.",
})
MaxConcurrentRejectCount = promauto.NewCounter(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "max_concurrent_rejects_total",
Help: "Counter of the number of queries rejected because the concurrent queries were at maximum.",
})
ConnCacheHitsCount = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "conn_cache_hits_total",
Help: "Counter of connection cache hits per upstream and protocol.",
}, []string{"to", "proto"})
ConnCacheMissesCount = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "forward",
Name: "conn_cache_misses_total",
Help: "Counter of connection cache misses per upstream and protocol.",
}, []string{"to", "proto"})
)
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